It seems they have changed the format of function that needs to be changed. It looks like this now:
docker exec onlyOff grep -oP ā.{0,10}isSupportEditFeature=.{20}ā /var/www/onlyoffice/documentserver/web-apps/apps/spreadsheeteditor/mobile/dist/js/app.js =>null;ev.isSupportEditFeature=()=>!1;var tv,nv,rv=
so we need to use command like this now:
docker exec onlyOff sed -i ās/isSupportEditFeature=()=>!1/isSupportEditFeature=()=>1/gā /var/www/onlyoffice/documentserver/web-apps/apps/spreadsheeteditor/mobile/dist/js/app.js && docker exec onlyOff sed -i ās/isSupportEditFeature=()=>!1/isSupportEditFeature=()=>1/gā /var/www/onlyoffice/documentserver/web-apps/apps/documenteditor/mobile/dist/js/app.js && docker exec onlyOff sed -i ās/isSupportEditFeature=()=>!1/isSupportEditFeature=()=>1/gā /var/www/onlyoffice/documentserver/web-apps/apps/presentationeditor/mobile/dist/js/app.js && docker restart onlyOff